>>119391175That's a very optimistic interpretation, but considering he appears to absorb the void's power while he's making the claim that he 'is the void', it's VERY likely he's being completely literal. It's up to Cates to reveal whether this is supposed to be retroactive, or something that just occurred for the first time now.
Be honest, which do you think he will go for? Let's keep in mind, Knull's entire existence revolves around retroactively creating a god for the symbiotes.
